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Section 4 Identification of Problems and Opportunities

EAA Storage Reservoirs Revised Draft PIR and EIS February 2006

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• Reduce regulatory releases of water from Lake Okeechobee to the St.

Lucie and Caloosahatchee estuaries,

• Increase flood protection within the EAA.

Flood protection benefits provided by this project will be considered incidental to

the additional water management improvements within the EAA.

The constraints are:

• Maintain existing levels of flood protection to agricultural and urban

lands (Savings Clause [Section 601 (h)(5) of WRDA 2000]).

• Maintain levels of service for existing (Savings Clause) legal users.

• Minimize impacts to cultural, historical and archaeological resources.

• Minimize adverse socioeconomic impacts on the local and regional

economies.

• For the EAA Storage Reservoir Project the key water quality constituents

defined by FDEP for discharges to Class III and IV waters are constraints.

4.2.1 Project Evaluation Criteria and Evaluation Methods and Models

The general project evaluation criteria can be summarized into three categories

consistent with the CERP:

• Enhance Ecological Values

• Enhance Economic Values and Social Well Being

• Cost, Risk, and Uncertainty

Using these general criteria as guidelines, project-specific performance measures

and evaluation methods were established to evaluate alternative plans. Section

5.3 contains additional information on project-specific performance measures

utilized to depict ecosystem restoration benefits. Annexes E and G contain

additional information on other criteria used to evaluate alternative plans.

4.2.1.1 Evaluation Tools

The following modeling tools were used in the development, optimization, and

evaluation of the project:

• Modflow - A three dimensional computer program that is generally used

to model the hydrogeology of large areas including their associated

hydraulic features. This model has been used to evaluate potential off-site

impacts including location and magnitude. This model also is being

utilized to evaluate the potential use of cut-off walls to ensure that off-site

impacts are within acceptable limits.

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Wenger 72944 Especificações Página 150